JPS58103242A - Private optical space transmitting system - Google Patents

Private optical space transmitting system

Info

Publication number
JPS58103242A
JPS58103242A JP56202266A JP20226681A JPS58103242A JP S58103242 A JPS58103242 A JP S58103242A JP 56202266 A JP56202266 A JP 56202266A JP 20226681 A JP20226681 A JP 20226681A JP S58103242 A JPS58103242 A JP S58103242A
Authority
JP
Japan
Prior art keywords
light
terminal device
satellite
light source
satellite device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56202266A
Other languages
Japanese (ja)
Inventor
Nobuhide Yamaguchi
山口　伸英
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56202266A priority Critical patent/JPS58103242A/en
Publication of JPS58103242A publication Critical patent/JPS58103242A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/1149—Arrangements for indoor wireless networking of information

Landscapes

  • Engineering & Computer Science (AREA)
  • Computing Systems (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To eliminate the need for the high-level output for a light source of a satellite device and to secure the receiving level to protect a human body, by reflecting the light beam emitted to right above from a light source of a terminal device by a reflecting plate set above a private optical space and then making the light beam incident to the satellite device. CONSTITUTION:A hemispherical photodetecting element array 7 containing a hemispherical surface 8 and a photodetecting element 9 as well as a light source 6 are connected to a terminal device 2. Then the light beam given from the light source 6 is reflected by a reflecting plate 3 hung from a ceiling 4 and then made incident to a satellite device 1. The diffusing light emitted from the device 1 is reflected at the ceiling 4 and a wall 5 and made incident to the array 7 of the device 2. Then the reflected light is received by each element 9. Thus the photodetecting area is equivalently increased to improve the detecting effect. This can eliminate the high-level output for the device 1, and a result a receiving level secured to reduce the effect to a human body.

Description

【発明の詳細な説明】 本発明は同一構内フロア内の通信に適用される構内光空
間伝搬方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an indoor optical space propagation method applied to communication within the same premises floor.

へイクエイ、データリンク等の光回線または電気回線に
接続されたサテライト装置と、該サテライト装置と同一
構内フロア内に設けられ光電気変換回路を内蔵した電話
機、データ端末等の端末装置との間で光信号を空間伝搬
する構内光空間伝搬方式においては、人や物等により光
信号のしゃ断、拡散を行うことは、光源の高出力化、受
信レベルの確保等の問題があり、また光源高出力化に伴
う人体保護上の問題がある。Between a satellite device connected to an optical line or an electric line such as a satellite or data link, and a terminal device such as a telephone or data terminal that is installed on the same floor as the satellite device and has a built-in opto-electrical conversion circuit. In the indoor optical space propagation method that propagates optical signals through space, blocking or diffusing the optical signals by people or objects poses problems such as increasing the output of the light source and securing the reception level. There are health protection issues associated with this change.

本発明は上述の問題を解決するためのもので、光源の高
出力化を必要とせずしかも受信レベルを確保できる人体
に安全な構内光空間伝搬方式を提供することを目的とし
ている。The present invention is intended to solve the above-mentioned problems, and aims to provide an indoor optical space propagation system that is safe for the human body and that does not require a high output light source and can secure a reception level.

以下、図面に関連して本発明の詳細な説明する。The invention will now be described in detail in conjunction with the drawings.

第１図はこの方式を実施する装置の概要を示す正面図で
、図中、１はサテライト装置、２は端末装置、３は反射
板、４および５は構内の天井および壁である。FIG. 1 is a front view showing an outline of a device implementing this method. In the figure, 1 is a satellite device, 2 is a terminal device, 3 is a reflector, and 4 and 5 are the ceiling and walls of the premises.

端末装置２は光源６および半球状受光素子アレイ７を備
えている。半球状受光素子アレイ７は、半球面８に沿っ
て複数個の受光素子９を配設してなる。The terminal device 2 includes a light source 6 and a hemispherical light receiving element array 7. The hemispherical light receiving element array 7 is formed by arranging a plurality of light receiving elements 9 along a hemispherical surface 8.

反射板２は、光源６の真上に天井４から吊り下げられて
いる。The reflector 2 is suspended from the ceiling 4 directly above the light source 6.

サテライト装置１から端末装置２への光信号伝搬は、サ
テライト１から第１図に矢印線で示すように出射された
拡散光を天井４．１！５で反射させ端末装置２の半球状
受光素子アレイ７に入射させて行う。この場合、半球状
受光素子アレイ７には第１図に矢印線で示すように各方
向から光が入射し、これらの光は第２図に示すように半
球面８に沿って設けられた各受光素子９によりそれぞれ
検出されるため、等制約に受光面積が増し、各受光素子
９を特に高受光感度の高価なものＫしなくても十分検出
効果を上げることが可能で、回路構成が簡単なこととも
関連してコスト低減がはかれ、しかもサテライト１の光
源の高出力化を必要としない。また一方向にじゃへい物
がある場合他方向から受光できるため、端末装置２の横
につい立て１０等のしやへい物を置いて人体保護を図る
ことも可能である。Optical signal propagation from the satellite device 1 to the terminal device 2 is achieved by reflecting the diffused light emitted from the satellite 1 on the ceiling 4.1!5 as shown by the arrow line in FIG. This is done by making the light incident on the array 7. In this case, light enters the hemispherical light-receiving element array 7 from each direction as shown by the arrow lines in FIG. Since each light receiving element 9 is used for detection, the light receiving area increases evenly, and the detection effect can be sufficiently increased without using an expensive one with high light receiving sensitivity for each light receiving element 9, and the circuit configuration is simple. In connection with this, costs can be reduced, and the light source of the satellite 1 does not need to have a high output. Furthermore, if there is an obstruction in one direction, light can be received from the other direction, so it is also possible to protect the human body by placing a obstruction, such as a stand 10, next to the terminal device 2.

また、端末装置２からサテライト装置１への光信号伝搬
は、第１図に矢印線で示すように、光源６から真上に光
ビームを出射させ、これを反射板５により反射させサテ
ライト装（ｉｉｆｌに入射させて行う。この場合、光源
６からの光ビームは真上に出射されるため、しやへい対
策２人体保護等の効果がある。In addition, optical signal propagation from the terminal device 2 to the satellite device 1 is achieved by emitting a light beam directly above from the light source 6 and reflecting it by the reflecting plate 5, as shown by the arrow line in FIG. In this case, since the light beam from the light source 6 is emitted directly above, there are effects such as prevention of physical injury and protection of the human body.

以上述べたように、本発明によれば、次に述べるような
各種の優れた効果を奏することが可能である。As described above, according to the present invention, it is possible to achieve various excellent effects as described below.

（１）ｆテライト装置から出射され半球状受光素子アレ
イに受光される光は散乱光でありしかも一方向にじゃへ
い物を設けても効果的な受光が行われるため、端末装置
の光源から出射する光ビームが真上に出射されることと
関連して人体の安全がはかられる。(1) The light emitted from the f-tellite device and received by the hemispherical light-receiving element array is scattered light, and effective light reception can be performed even if a barrier is provided in one direction, so the light emitted from the light source of the terminal device The safety of the human body is ensured by emitting the light beam directly above.

（２）　　サテライト装置から出射する散乱光は半球状
受光素子アレイにより効果的に検出されるため、高出力
の光源を必要とせずに受信レベルを確保できる。(2) Since the scattered light emitted from the satellite device is effectively detected by the hemispherical light-receiving element array, the reception level can be ensured without the need for a high-output light source.

（３）　　半球状受光素子アレイは普通の受光素子を用
い高感度の高価な受光素子を必要としないため、コスト
を低減できる。(3) Since the hemispherical light receiving element array uses ordinary light receiving elements and does not require highly sensitive and expensive light receiving elements, costs can be reduced.

【図面の簡単な説明】[Brief explanation of drawings]

図面は本発明に係る構内光空間伝搬方式の実施例を示す
もので、第１図はこの方式を実施する装置の概要を示す
正面図、第２図は半球状受光素子アレイの作用説明図で
ある。 図中、１はサテライト装置、２は端末装置、３は反射板
、４は天井、５は壁、６は光源、７は半球状受光素子ア
レイである。 特許出願人　富士通株式会社 代理人　弁理士　玉蟲久五部 （外３名） 第１図 第２図The drawings show an embodiment of the indoor optical space propagation method according to the present invention, and FIG. 1 is a front view showing an overview of a device implementing this method, and FIG. 2 is an explanatory diagram of the operation of a hemispherical light-receiving element array. be. In the figure, 1 is a satellite device, 2 is a terminal device, 3 is a reflector, 4 is a ceiling, 5 is a wall, 6 is a light source, and 7 is a hemispherical light receiving element array. Patent applicant Fujitsu Ltd. agent Patent attorney Gobe Tamamushi (3 others) Figure 1 Figure 2

Claims (1)

【特許請求の範囲】[Claims] 光回線または電気回線に接続されたサテライト装置と、
該サテライト装置と同一構内フロア内に設けられ光電気
変換回路を内蔵した端末装置との間で光信号を空間伝搬
する方式において、前記サテライト装置から前記端末装
置への光信号伝搬は、前記サテライト装置から拡散光を
出射してこれを前記端末装置に設けられた半球状受光素
子アレイにより検出させて行い、前記端末装置から前記
サテライト装置への光信号伝搬は、前記端末装置の光源
から真上に出射する光ビームを構内光空間上方に設けら
れた反射板により反射させて前記サテライト装置に入射
させること罠より行うことを特徴とする構内光空間伝搬
方式。A satellite device connected to an optical line or electric line,
In a method of spatially propagating an optical signal between the satellite device and a terminal device installed on the same campus floor and incorporating a photoelectric conversion circuit, the optical signal propagation from the satellite device to the terminal device is carried out by the satellite device. This is done by emitting diffused light from the terminal device and detecting it by a hemispherical light-receiving element array provided in the terminal device, and optical signal propagation from the terminal device to the satellite device is carried out directly above the light source of the terminal device. An indoor optical space propagation system characterized in that an emitted light beam is reflected by a reflector provided above the indoor optical space and made incident on the satellite device using a trap.
JP56202266A 1981-12-15 1981-12-15 Private optical space transmitting system Pending JPS58103242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56202266A JPS58103242A (en) 1981-12-15 1981-12-15 Private optical space transmitting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56202266A JPS58103242A (en) 1981-12-15 1981-12-15 Private optical space transmitting system

Publications (1)

Publication Number Publication Date
JPS58103242A true JPS58103242A (en) 1983-06-20

Family

ID=16454687

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56202266A Pending JPS58103242A (en) 1981-12-15 1981-12-15 Private optical space transmitting system

Country Status (1)

Country Link
JP (1) JPS58103242A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4977618A (en) * 1988-04-21 1990-12-11 Photonics Corporation Infrared data communications
US5001780A (en) * 1983-06-24 1991-03-19 Sharp Kabushiki Kaisha Optical communication adapter with projector
US5384652A (en) * 1991-02-22 1995-01-24 Photonics Corporation Infrared communication repeater architecture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5001780A (en) * 1983-06-24 1991-03-19 Sharp Kabushiki Kaisha Optical communication adapter with projector
US4977618A (en) * 1988-04-21 1990-12-11 Photonics Corporation Infrared data communications
US5384652A (en) * 1991-02-22 1995-01-24 Photonics Corporation Infrared communication repeater architecture

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